Perth18.13 Groundwater allocation diversion - irrigation scheme

Supporting Information

This line item refers to the volume of water extracted from bore fields for irrigation water supply.

Quantification Approach

Data Source

Department of Water: Water Resource Licensing database.

Provided by

Department of Water.

Method

There is only one groundwater irrigation licence within the Perth region (Chittering Valley). No metered data are available; however, according to the licence holder, no groundwater was extracted during the 2010–11 year.

Assumptions, Limitations, Caveats and Approximations

Nil.

Uncertainty Information

The uncertainty estimate was not quantified.

Comparative year

The following table presents substantive changes in the line item reported in this 2011 Account with the corresponding line item in the 2010 Account.

Comparative year information for line item 18.13

2011 Account line item

2010 Account line item

2011 Account volume for the 2009–10 year (ML)

2010 Account volume for the 2009–10 year (ML)

Change from the 2010 Account to the 2011 Account

18.13 Groundwater allocation diversion - irrigation scheme

16.5.3.1 Groundwater allocation extraction–bulk irrigator holder

0

652

Volume restated due to subsequent availability of information from licence holder

Change in line item name and number

Because no metered data were available in the 2010 Account, the volume of extraction was estimated to be the full annual allocation amount of 652 ML. Subsequent to the publication of the 2010 Account, the licence holder indicated that no extraction had occurred during the 2009–10 year. This change was considered material by the report preparer and so the volume was restated in the accounting statements.